hi,
i'm just getting back to some maya api c++ and am hitting my head on the
following:
i have an input and output array of matrices. for the number of inputs i
want the node to create the number of outputs. but my following code
doesn't seem to work. i based it on some devkit nodes who do something
similar with other data types as outputs. any help?
// initialize
aInputMatrices = mAttr.create("inputMatrices", "inputMatrices");
mAttr.setStorable(false);
mAttr.setConnectable(true);
mAttr.setArray(true);
mAttr.setHidden(true);
mAttr.setUsesArrayDataBuilder(true);
addAttribute(aInputMatrices);
aOutputMatrices = mAttr.create("outputMatrices", "outputMatrices");
mAttr.setStorable(false);
mAttr.setWritable(false);
mAttr.setStorable(false);
mAttr.setArray(true);
mAttr.setUsesArrayDataBuilder(true);
addAttribute(aOutputMatrices);
attributeAffects(aInputMatrices, aOutputMatrices);
// compute method
MStatus status;
MArrayDataHandle hInputMatrices = data.inputArrayValue(aInputMatrices,
&status);
CHECK_MSTATUS_AND_RETURN_IT(status);
cout << "count: " << hInputMatrices.elementCount() << endl;
MArrayDataHandle hOutputMatrices =
data.outputArrayValue(aOutputMatrices, &status);
CHECK_MSTATUS_AND_RETURN_IT(status);
MArrayDataBuilder builder(aOutputMatrices,
hInputMatrices.elementCount(), &status);
CHECK_MSTATUS_AND_RETURN_IT(status);
for (unsigned int listIndex=0; hInputMatrices.elementCount();
listIndex++) {
cout << listIndex << endl;
MDataHandle outHandle = builder.addElement(listIndex);
hInputMatrices.jumpToElement(listIndex);
MMatrix curMat = hInputMatrices.inputValue(&status).asMatrix();
outHandle.setMMatrix(curMat);
}
status = hOutputMatrices.set(builder);
CHECK_MSTATUS_AND_RETURN_IT(status);
status = hOutputMatrices.setAllClean();
CHECK_MSTATUS_AND_RETURN_IT(status);
return status;
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